A reputable locksmith in New Zealand should always provide a clear guarantee covering both the parts they supply and the workmanship they carry out. While there is no single industry-wide standard that sets a specific guarantee period, your rights as a consumer are protected by law — and knowing what to expect helps you hire with confidence.
Your Consumer Rights Come First
Before looking at what a locksmith might voluntarily offer, it's worth understanding your baseline legal protections. Under the Consumer Guarantees Act 1993 (CGA), any tradesperson providing services in NZ must carry out work with reasonable care and skill, and any goods (such as locks, deadbolts, or cylinders) they supply must be of acceptable quality and fit for purpose. These guarantees apply automatically — they don't depend on what the locksmith writes on their invoice.
This means if a lock fails prematurely due to a manufacturing fault or poor installation, you have the right to have it repaired, replaced, or refunded, regardless of whether the locksmith offered a written guarantee. For more detail on your rights, Consumer NZ is an excellent resource.
What a Good Locksmith Should Offer in Writing
Beyond your legal minimums, a professional locksmith should be willing to provide a written guarantee that clearly states:
- Labour warranty period — typically 12 months on workmanship is considered reasonable in the trade, though some businesses offer longer.
- Parts warranty period — this often follows the manufacturer's warranty on the lock hardware itself, which can range from 1 to 5 years depending on the brand and product grade.
- What is and isn't covered — for example, damage caused by misuse or attempted break-ins is generally excluded.
- How to make a claim — a contact name, phone number, and process for getting issues resolved.
Always ask for this in writing before work begins, or at least on the invoice once the job is complete.
Parts: Understanding Lock Quality and Manufacturer Warranties
The quality of the lock hardware matters enormously. Cheap, unbranded locks may carry little or no manufacturer warranty, while reputable brands sold through established NZ suppliers often back their products with multi-year guarantees.
When your locksmith recommends a product, it's reasonable to ask:
- What brand is it? Is it a recognised, quality brand?
- What does the manufacturer warrant? Some high-security locks carry 5-year or even lifetime mechanical warranties.
- Is it graded to a standard? Look for locks tested to AS/NZS 4145 (the Australasian standard for mechanical locks), which gives you confidence in the product's security rating.
A trustworthy locksmith will be happy to answer these questions and provide documentation.
Labour: What's Reasonable to Expect
For workmanship, 12 months is a widely accepted minimum in the NZ trade services industry. Some locksmiths offer longer — particularly for larger jobs like rekeying an entire property or installing a master key system.
Key things to confirm:
- Does the guarantee cover call-back visits at no charge if the issue is related to the original work?
- Is the guarantee transferable if you sell the property? (Less common, but worth asking for commercial installations.)
- Does it cover adjustment of locks that become stiff or misaligned due to installation issues?
Red Flags to Watch Out For
Be cautious if a locksmith:
- Refuses to provide any written guarantee or becomes evasive when asked.
- Cannot name the brand of lock they are installing or won't show you the product packaging.
- Quotes a very low price but uses unbranded or low-grade hardware — cheap parts often mean short-lived performance.
- Doesn't provide an invoice — without one, making a warranty claim becomes very difficult.
- Pressures you to decide immediately, especially during an emergency lockout situation.
Healthy Homes and Rental Properties
If you're a landlord, note that door and window locks are part of your obligations under the Healthy Homes Standards. Check with Tenancy Services for the specific requirements that apply to your property. If a locksmith carries out work on a rental property, keeping records of guarantees and invoices is important for compliance. Tenancy Services has full details on landlord obligations.
When to Call a Professional
Locksmithing is not legally restricted work in the same way that electrical or plumbing work is — there is currently no mandatory licensing regime for locksmiths in New Zealand. However, this makes it even more important to choose carefully. Look for locksmiths who are members of a recognised trade body, carry public liability insurance, and can demonstrate experience with the type of lock or security system you need.
For high-security installations, master key systems, or work on commercial premises, always use an experienced professional. You can find qualified local locksmiths on tradedirectory.co.nz.
